Wii Fit Plus Advance Step Up

HI There,
I have been using the WII Fit for over 12 months and I can get to advance levels on many activities except for Step Plus. Is there an advanced level on Step Plus (you know where the arrows allow you to either + or - duration)??
I really do get a workout for Step Plus but it means I have to restart it again after everyy 5 minutes which is really annoying
Looking forward to hearing back from someone! Have a great day.....